Aftermarket CD Player

I am wondering if anyone here has gotten an aftermarket cd player for their Elantra and if so which kind and how is it? I was searching circuit city and best buy's websites and they had none that fit the Elantra.

What year Elantra? I have a '99 and I replaced the stock deck with a cheap Jensen brand CD unit.

I added on to the stock radio/cassette deck with a FM-modulated 10-disc changer. Works great and I don't have to fiddle with CDs while driving. Don't remember the brand off the top of my head.